Air Raid, Apple, Atari 2600, Ben Heck, EEweb, electronics podcast, Gyrator, H1, Junior, KiCad, Lithium Battery, MacroFab, macrofab engineering podcast, Plugin, Rackmount
Podcast
199

MEP EP#199: High Voltage Gyrators and KiCad Plugins

Podcast Notes

Parker

  • 50V power pack update
    • Managed to safely remove the cells
    • Protection circuit is functioning correctly
    • One of the 4 banks is “bad”
    • Scrapping all the 18650’s for future projects
  • Helping Ben debug the Atari Junior 2600 Single Chip system
    • Atari 2600’s typically have 3 main ICs
      • 6507 CPU
      • RIOT (RAM and I/O)
      • TIA (Graphics and Sound)
  • Air Raid Siren all printed
    • Needs final fitment and assembly to be completed!

Stephen

  • Rackmount case
    • Designed a rackmount case for a 1u preamp
    • New v-score bend method that works great on aluminum
    • A mixture of chamfer and cut relief
    • Can be bent by hand
  • Back to Gyrators
    • 300V 4 band EQ using high voltage Mosfets as gyrators
    • Gyrators first mentioned on Episode 173 of the MEP
    • Wanted to solve the issue of not having to make more power supply rails
    • About +/- 12is db per band
    • 80hz, 220hz, 750hz and 2k

R.F.O.

  • KiCad Action Plugins
    • Run your KiCad Python scripts direct inside the UI now!
    • RF tools – a very cool curved trace plugin
    • Parker’s major complaint about Zoom Centering in KiCad hasn’t been an issue for atleast 2 years now
      • Why did no one tell Parker 🙁
  • EE Web – now with more TOOLS!
    • All about Arrow
    • More EDA tools then you can shake a stick at!
  • Apple H1 Chip?
    • Silly marketing wank
    • Its just a custom MCU

How older style amps where built. Could be easy or hard to service...depending on your point of view.

How older style amps where built. Could be easy or hard to service…depending on your point of view.

 

Cut profile for bending aluminum on a CNC machine!

Cut profile for bending aluminum on a CNC machine!

 

Inside the Stephen's and Roz's high voltage preamp.

Inside the Stephen’s and Roz’s high voltage preamp.

 

Atari 2600 Junior with the JAN chip.

Atari 2600 Junior with the JAN chip.


Special thanks to whixr over at Tymkrs for the intro and outro!